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UL634H256SK45G1 Datasheet(PDF) 9 Page - Simtek Corporation |
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UL634H256SK45G1 Datasheet(HTML) 9 Page - Simtek Corporation |
9 / 15 page UL634H256 9 August 15, 2006 STK Control #ML0058 Rev 1.1 u: If the chip enable pulse width is less then ta(E) (see READ cycle) but greater than or equal to tw(E)SR, then the data may not be valid at the end of the low pulse, however the STORE or RECALL will still be initiated. v: W must be HIGH when E is LOW during the address sequence in order to initiate a nonvolatile cycle. G may be either HIGH or LOW throughout. Addresses 1 through 6 are found in the mode selection table. Address 6 determines whether the UL634H256 performs a STORE or RECALL. w: E must be used to clock in the address sequence for the software controlled STORE and RECALL cycles tcR tw(E)SR ADDRESS 1 VALID Software Controlled STORE/RECALL Cyclet, u, v, w (E = HIGH after STORE initiation) ADDRESS 6 (29) (29) th(A)SR (35) (34) tsu(A)SR (33) tcR tw(E)SR ADDRESS 1 VALID VALID ADDRESS 6 td(E)S (31) (32) (29) th(A)SR (35) (34) tsu(A)SR (33) tdis(E)SR (30) th(A)SR (35) tsu(A)SR (33) tw(E)SR th(A)SR (35) (34) tsu(A)SR (33) (5) tdis(E) Software Controlled STORE/RECALL Cyclet, u, v, w (E = LOW after STORE initiation) tdis(E)SR (30) VALID High Impedance High Impedance Ai E DQi Output Ai E DQi Output td(E)S (31) (32) td(E)R td(E)R tcR |
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